Trimming machine



Aug-25, 1936. HAZELTON 2,051,852

TRIMMING MACHINE Filed on. so, 1954 3 Sheets-Sheet 1 Aug. 25, 1936. G. HAZEL-"ION 2,051,852

TRIMMING MACHINE Filed 00}. 30, 1954 3 Sheets-Sheet 2 F110. Fig 11. Z6 Z8 G. HAZELTON TRIMMING MACHINE Aug. 25, 1936.

Filed Oct. 30, 1954 5 Sheets-Sheet 3 Patented Aug. 25, 1936 UNITED STATES TBIMMING MACHINE George Hazelton, Leicester, England, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application October 30, 1934, Serial No. 750,686

In Great Britain November 29, 1933 16 Claims.

No. 1,708,401, granted April 9, 1929, upon" an application filed in the names of Ricks & Woodcock.

In the manufacture of shoes having Louis heels.

however, it is desirable to provide heel-breast covering flaps having Viennese edges which in the finished shoe extend slightly beyond the breast edges of the heel and are rounded. Be-- fore the lateral edges of the heel-breast covering flapare rounded by a burnishing tool it is necessary to trim the laterallyprojecting margins so that they extend just beyond the respective breast edges of the heel. Moreover, in order to facilitate the formation of a rounded edge it is desirable that opposite sides of the slightly projecting portion of the trimmed .flap be beveled.

The trimming of the projecting lateral portions of heel-breast covering flaps to the desired width and shape preparatory to burnishing or otherwise finishing the same may be performed by hand. While satisfactory results may be achieved by hand trimming and finishing, such operations are slow and care must be .taken to insure that both edge faces of the flap are trimmed and finished alike. Moreover, such operation requires the services of a skilled operator.

With the above-mentioned circumstances in view and in accordance with a feature of this invention there is provided spaced gages constructed and arranged to engage opposite sides of a piece of flexible sheet material, and cutters which are movable in paths disposed at substantial angles to each other for trimming material guided past the cutters by said gages with intersecting beveling cuts. The illustrated construction is described with reference to trimming the projecting lateral margins of a heel-breast covering flap cemented to a heel, the work-guiding mechanism comprising a pair of spaced gages one of which engages a side of the heel adjacent to a breast edge beyond which the heelbrcast covering flap projects and the other of which engages the covered breast of the heel adjacent to the breast edge. The cutters which trim the projecting lateral margins of the heelbreast covering flap travel in intersecting paths and each is moved across the path of cutting movement ofthe other alternately to trim sur-' plus material from such margins with a pair of beveling cuts thus forming a V-shaped edge face which projects beyond the breast. edge of the heel. I V V I 7 With the above construction "the projecting margins of heel-breast covering flaps attached to heels may be quickly and effectively'trimmed to provide V-shaped edge faces which project laterally of corresponding breast edges of the heel.

These and other features'of the invention in-' cluding certaindetails of construction and combination of parts will be described as embodied in an illustrated machine and pointed out in the appended claims. V

Referring now to the accompanying drawings,

Fig. 1 is a side view of the illustrated machine, a side cover'of which has been removed 'to' show cutter-operating mechanism of the machine; 20

Fig. 2 is an enlarged side elevation of the portion of the machine to which work is presented;

Fig. 3 is a front elevation of a portion of the machine as viewed along line IIIIII of Fig. 2;

Fig. 4 is a view showing in perspective trimming knives and gages of the illustrated machine during the trimming of one of the projecting mar gins of a heel-breast covering flap which has been cemented to the breast of a heel;

Fig. 5 is an enlarged sectional View of a heel before a projecting margin of its heel-breast covering flap has'been trimmed;

r Fig. 6 isa view showing the machine in the process of trimming the projecting margin of the flap illustrated in Fig. 5;

Fig. '7 is a view showing the edge face of the flap after it'has been trimmed by the illustrated machine;

Fig. 8 is a view of a portion of the heel the heelv breast covering flap of which is in the process of having its edge face rounded by one form of edge-setting tool;

Figs. 9, 10, 11 and 12 illustrate heel-breast covering flaps having edge faces of various shapes;

Fig. 13 is a sectional view taken along the line XIIIXIII of Fig. 1; V

Fig. 14 shows a side view of the operating head of the machine provided with modified work-positioning gages;

Fig. 15 is a front elevation of the machine illus-v trated in Fig. 14; and

Fig. 16 is'a side view of a modified work gage of the machine.

The illustrated machine is described with reference to trimming the projecting lateral margins 20 (Fig. 5) of covers or heel-breast covering flaps 22 which have been cemented to the breasts of heels 24, with a pair of beveling cuts, thereby.

to provide a V-shaped edge: face comprising a pair of beveled surfaces 26 (Fig. 7) which intersect to form a ridge 28 (Figs. 4 and 7) and project laterally of a corresponding breast edge 38. The V-shaped edge face is then molded to a predetermined shape by a suitable edge setting or burnishing tool 32 (Fig. 8) to provide a project-- ing rounded edge face 34 which is referred to as a Viennese edge. The shape of the finished edge face may be varied in accordance with the shape of the edge-setting tool to provide Viennese edges 36, 38, 48 and M, such as illustrated in Figs. 9, l0, l1 and 12, respectively.

In order to trim the projecting lateral margins of the heel-breast covering flap to provide the V-shaped edge face illustrated in Fig. '7, the illustrated machine is provided with a pair of cutters or knives 42 and 44 mounted for reciprocation in intersecting paths, each of the knives being moved across the path of movement of the other alternately, and a pair of spaced gages 46, 48 for engaging the side and. the breast faces 58 and 52 of the heel respectively, adjacent to the breast edge 38 (Fig. 5) beyond which the margin 28 of the heel-breast covering flap projects, in order to guide the heel 24 and the projecting margin 28 past the knives 42 and 44. It will thus be noted that the cutters are mounted for movement in paths intersecting each other approximately midway between the sides or side faces 29 and 3| (Fig. 5) of the projecting lateral margin 28 of the heel-breast covering flap 22.

In the illustrated trimming machine the trimming knives'42, 44 are arranged for reciprocation in paths inclined at an angle of 90 to each other and are inclined at about 45 to the horizontal. The knives 42, 44 are similarly formed and their cutting edges 54 and 56, respectively, are laterally curved as illustrated in Fig. 4 in order to facili tate trimming along a sharply curved part of the breast edge 38 of the heel 24. The knife 42 is secured to the lower end of a carrier 58 mounted in a guideway 68 which is formed in the machine frame, the knife being secured to the carrier by a screw 62 which is in threaded relation with the carrier 58 and passes through an elongated slot in the knife so that the latter may be initially adjusted relatively to the carrier. The carrier 58 is reciprocated along its guideway 68 by an eccentric 64 (Fig. 1) keyed to the end of a horizontal shaft (not shown) which is rotatably mounted in the machine frame and is rotated by a pulley 6i driven by a belt 63. The eccentric 64 is housed within an inner race 65 of a ball bearing the outer race 66 of which engages faces 68 and I8 of the carrier 58. The face 68 forms part of the bottom of an opening extending laterally through the carrier 58, and the face I8 is formed on the lower end of a block I2 which may be adjusted relatively to the carrier 58 in order to position the block lengthwise of the carrier. To compensate for wear of the faces 68 and I8 and of the outer race 66, the block I2 may be moved to adjusted position relatively to the ball bearing by the provision of a screw 14 in threaded relation with the carrier 58 and engaging the block I2. The screw I4 carries a lock-nut I6 for securing it in proper adjusted position.

The upper end of the carrier 58 is provided with an extension I8 which is connected by a dumbbell shaped member to an arm 82 of a bellcrank lever 84. The bell-crank lever, is secured on a stud (Fig. 13) rotatably and slidably mounted in the, machine frame. A head 86 on the'stud 85 against which the lever is clamped by a nut 81 is held by a spring 89 against a face 9| on the machine frame. The spring 89 bears against the bottom of a recess in the machine frame and against a collar secured to the stud 85. The spring 89 takes up the wear between the head 86 and the frame. The stud 85 is secured in the main frame at substantially the same level as the point where the paths of movement of the trimming knives 42 and 44 intersect. The arm 82 of the bell-crank lever 84 extends downwardly and rearwardly from its connection with the dumb-bell member 88 at an angle of approximately 45 to the horizontal. A lower arm 98 of the bell-crank lever 84 extends forwardly and downwardly from the stud 85 at an angle of approximately 45 and is connected by a second dumb-bell member 92 to the lower end of a carrier I 88 to which the knife 44 is secured by a screw I82. The carrier I88 is mounted in a guideway I84 of the machine frame and extends upwardly and forwardly at an angle of about 45. The dumb-bell shaped members 88, 92 are both alike and have at their ends rectangular blocks I86, I88, respectively, which are clamped in circular bores in the carriers and the arms of the bell-crank lever. The carrier 58 and the arm 82 are split to receive the blocks I 86, respectively, which are held within the circular bores of these members by screws H8. The carrier I88 and the arm 98 are also split for the reception of the blocks I88 which are held in place within the bores of these members, respectively, by screws II I. The rectangular blocks I86, I88 are joined by comparatively thin shank portions which may bend slightly laterally as the carriers 58, I88 move in rectilinear paths and the bell-crank lever 84 pivots about the stud 85. In order to obtain as much lateral flexibility of the dumb-bell shaped members 88, 92 as possible while retaining sulficient strength lengthwise to actuate the carriers 58, I88 the dumb-bell shaped members may be divided lengthwise, the thin portion being divided into two still thinner and more flexible portions.

The heel 24 and the heel-breast covering flap 22 are guided by the gages or guides 46, 48 as they are fed by the operator past the knives 42, 44. The gage 46 is secured by a screw H2 to the machine frame, which screw passes through a slot H4 in the gage so that the same may be adjusted in directions indicated by arrows H6 (Fig. 2). The gage 46 may be pivotally adjusted about the screw H2 by means of two adjusting screws III, I I8 which are in threaded relation with lugs I28 and I22, respectively, extending from the frame and are constructed and arranged to engage a flange I24 (Figs. 2 and 3) projecting from the gage. The gage 46 may be clamped in adjusted position by setting up on the adjusting screws H2, H1 and H8.

The upper face I26 (Fig. 4) of the gage 46 near its convex heel-engaging face I25 is somewhat rounded to conform to the lateral curvature of the cutting edge 54 of the knife 42 and the knife may be so adjusted on the carrier 58 that when the knife descends its cutting edge 54 just contacts with the upper surface I26 of the gage 46 to insure that a clean cut is made through the margin of the heel-breast covering flap 22. Although the knife 42 is described as engaging the upper surface I26 of the gage 46, the knife may be so arranged that it cooperates with the upper rounded edge of the heel-engaging face I25 of the gage 46 to form a shearing couple. By rounding the heel-engaging face I25 of the gage 46 the feeding of. the work past the knives. 42, 44 is facilitated. The under side of" the gage 46 is provided with a concavity I28 to. provide clearance for the upper ofthe shoe as the trimming progresses along-the upper part of the heel breast.

The gage 48 is secured to the frame by. ascrew I30 which passes through a slot I32 in the gage and is in threaded engagement with the machine frame sothat the gage may be conveniently adjusted in directions indicated by. arrows I34, the gage being provided with a tongue I36 which enters a groove I38 in the machine frame and prevents the gage from twisting about the screw I30. The upper surface I40 (Figs. 2 and 4) of the gage 48 is concave to conform to the transverse curvature of the under side of the knife 44'. The

flap-engaging face I42 (Fig. 6) of the gage 48 is convex and provides a smooth surface against which the heel-breast covering flap 22 cemented to the heel 24 bears and by which it is braced as it is fed past the knives 42, 44. The knife 44 passes through the projecting margin 20 just above the upper surface I40-of the gage 48.

The machine frame when viewed from the side (Fig. 1) is substantially in the form of a squarewith one of itscorners uppermost and having extending downwardly from it a base I44 which may be secured to a work bench '(not shown). The square portion of the frame is hollowed out at the center to provide clearance for the forepart of the shoe when the heel-breast flap is presented to and fed past the knives 42, 44. The frame is comparatively narrow. so that no part of it interferes with the manipulation of the shoe.

The bell-crank lever 84 is housed within the frame of the machine, a cover I46 (Fig. 3) corresponding in shape to the frame being secured to the side of the same by screws I48.

The knives 42, 44 are reciprocated at high speeds, the shaft upon which the eccentric 64 is mounted being driven at a speed of about 4,000 revolutions per minute, the knives reciprocating in the same vertical plane. The knives 42, 44 move toward the projecting margin 20 of the heel-breast covering flap alternatively and it is desirable that there should be as little slackness as possible in the connections of the mecha nism which operate the carriers 58, I so that the knives may be moved a definite distance to and fro and in order that the wear of the parts and the noise are eliminated as far as practicable. Particularly it is desirable in the case of the carrier 58 that the knife 42 shall have a definite movement because, as previously stated, the

"knife when it moves downwardly just engages the upper face I26 of the gage 46. The construction of the machine is such that its desirable result is as far as possible achieved since wear between the outer race 66 and the faces 68 and with which it engages can be compensated for by adjustment of the block 12 as above described. Moreover, the stud 85 upon which the bell-crank lever 84 is mounted can be adjusted to take up any wear between the stud and the bell-crank lever.

It will be noted as illustrated in Fig. '1 that the beveled faces 26 which form the ridge 28 are of equal sizes and aredisposed at the same angle to the general plane of the flap. By previously forming a V-shaped face at a lateral margin of the flap, the rounded face 34 (Fig. 8) may be quickly formed by the edge-setting tool 32. It is sometimes common to form heel-breast covering flaps having projecting edge faces such as illustrated in Figs. 9 and 10, 11 and 1-2, respec-' which. faces areformed; by. suitably shaped with \L-shaped tively, tools. after providing the flap edge facesofi the propershape.

The finishing of the v-shaped edge faces after they havebeen trimmed by the illustrated, ma-. chine may be-conveniently effected in a machine havinganoscillating burnishing tool with a workengaginggroove of the desired shape. A machine suitable for finishing the. edges. of: heel-breast covering flaps after they have been trimmed as above described may be in the nature of the at-' taohment which is disclosed in United States Letv ters. Patent No. 2,000,961, granted May 14, 1-935 onan application filed in the name of Keall and is provided with a. suitably formed tool. The edgefinishing machine is preferably provided with means wherebyduring. theoperation of the heelbreast covering cap the amount of oscillation of the tool can be varied by the operator so that when operating. around a comparatively sharply curvedpart of the edge of the flap the amount-of oscillation. of the tool may be smaller than when operating along a comparatively'straight part.

Figs. 14 and illustrate a machine similar to that above disclosed but having slightly modified work-positioning gages. Knives I46 and I48 are operated by mechanism similar to that for operating the knives 42 and. 44, respectively, the heel adjustably mounted in a block I62. The rod I60 is threaded at its upper end and has threaded on it a nut I64 which is held by a spring I 66 against the block I62. By adjusting the nut I64 the gage I50 may be adjusted vertically, upwardly and downwardly. The block I 62 has extended'from it a stem I68 slidably mounted in the machine frame and adjustable, bymeans of a nut I10 threaded on its upper end, parallel to the path of movement of a slide I12 to which the knife I48 is attached. The upper end of the stem I68 is provided with a recess of suitable size to receive a spring I14 the upper end of which is in engage ment with an upper face I15 of the opening. It will thus be clear that the nut I10 is held against the lower face "I of the opening by the spring I12 by turning the nut I10. The springs I66, I14.

are strong enough to prevent upward movement of the guide I by pressure of work against it. By means of the nut I64 the guide I50 may be adjusted vertically relatively to the edge of the knife I46 to vary the distance which the edge of the trimmed flap projects beyond'the side of the heel and bymeans of the nut I10 the gage I 50 may be adjusted to vary the position laterally of the flap of the apex ofthe'angles of the cuts made by the knives. This latter adjustment will necessitate adjustment of the knife I46 so that it-just engages the gage I50 and also the adjustment of the gage I52 to suit the thickness of the flap. Since breast flaps are usually comparatively thin and it is contemplated that the amount the breast flap projects beyond the side of the heel will in any case be small, the adjustment of the gage I50 Means are provided whereby the gageiI52 may be quickly adjusted to suit the thickness of the breast flap. It is desirable that the space between the gages I50, I 52 shall be such that the flap will just pass between them but that the gauges will control the edge of the flap. Since a change in thickness may occur in two consecutive flaps presented to the machine or even in the same flap it is desirable that that adjustment can be quickly made.

The gage I52 is made in two parts I 76, I78 connected together by a right and left-hand threaded screw I80 having on it a collar I82. The part I78 of the gage I52 is secured to the-frame by a screw I84 which passes through a slot in the part I78 and the part I78 has on it a tongue which enters a groove in the frame. The part I76 of the gage I52 has on it a tongue which enters the same groove as the tongue on the part I78. The tongue on the part I75 is held in a'groove by a screw I86 which passes through a slot in the part I76. The screw I does not clamp the part I78 to the machine frame, but allows such part to move upwardly or downwardly towards or from the gage I50 when either the screw I82 is rotated or when the screw I84 is slackened and the two parts I76, I78 are moved bodily on the frame towards 'or from the gage I58. The part I78 has adjustably mounted on it two screws I88 which are arranged to be engaged by the collar I82 when the screw I80 is adjusted to move the part I78 towards or from the gage I58. The screws I88 may be so adjusted that the screw I80 may be quickly rotated to adjust the part I76 from one predetermined position to another, which positions can be adjusted by means of screws I88 to suit the variation in the thickness of the breast flap. The adjustmentmay, however, be made irrespective of the positions of' the screws I 88 which may be used as limit stops toprevent over-adjustment of the part I76.

The gage I52 is shaped so that the breast flap below the edge which is being trimmed may be held against it and this part of the guide controls the angle of the cuts in relation to the flap. If it is desired to trim a flap in which the angles of the cuts are, for instance as illustrated in Fig. 12, a different part I75 will be used instead of the part shown in Fig. 14 so that the heel can be tilted and the trimming knife caused to trim the edge to the desired angles. To obtain the shape of the edge shown in Fig. 12 it will be necessary to adjust the gage I58 slightly. The knife I 48 passes-through the material just above the upper surface of the gage I58.

In order to reduce the reshaping of the edge face of the cover by the edge setting tool 32 to a minimum it is desirable that the beveled surfaces shall approximate as'nearly as practicable the shape of the edge face of the breast cover of the finished shoe. Accordingly the gages 46 and 48 as well as the gagesI50, I52 are constructed and arranged to permit the operator to dispose the projecting margins of the breast cover at various angles to the paths of movement of the' knives I48, I48.

It is desirable that the gage which engages the side of the heel shall be adjusted lengthwise of the paths of movement of the knives I46, I48, respectively. Accordingly, as illustrated in Fig. 16 of the drawings, a gage I 98 is clamped by a set screw I92 to the main frame, the gage being provided with an elongated opening I94. The opening I94 is arranged in parallel relation with the path of movement; of the knife I48. A

rod I96 is secured tothe gage I and passes through arecess formed in a bossLISB. The recess through which the'rod I96 passes is arranged in parallelrelation with the path of movement of the knife I48. A spring 200 is positioned between the boss I 98 and the lower enlarged end of the rod I98, the upper end of which is in threaded relation with an adjusting nut 282. The block I98 is provided with a stem 204 constructed and arranged to slide in a recess 1 206 of the main frame. The recess is arranged in parallel relation with the'path of movement of the knife I46. The stem 204 may be adjusted along the recess 206 by a nut similar to the nut I70 illustrated in Fig. 14. In view of thel foregoing it will be clear that the gage I90 may be adjusted lengthwise'of the path of movement of the cutter I48 by releasing the set screw I92 and turning the nut 202, and may be adjusted lengthwise of the path of movement of the cut- 2 ter I46 by sliding the stem 204 along the recess 206.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a trimming machine, spaced gages constructed and arranged to engage opposite sides of a. piece of flexible sheet material, and cutters movable in paths disposed at substantial angles to each other for trimming material guided past 0 the cutters by said gages thereby to trim the material with intersecting beveling cuts.

'2. In a trimming machine, spaced guide members constructed and arranged to engage the opposite side faces of a piece of flexible sheet material, and cutters provided with laterally curved cutting edges respectively mounted for movement in paths intersecting each other between the side faces of said material guided past the cutters by said guide members thereby to trim the margins of the material with intersecting beveling cuts.

3. In a trimming machine, spaced guide members constructed and arranged to engage the opposite side faces of a piece of flexible sheet material, cutters mounted for movement in paths intersecting each other between the side faces of said material guided past the cutters by said guide members thereby to trim the margins of the material with intersecting beveling cuts, and mechanism for rapidly reciprocating each of the cutters across the path of movement of the other alternately.

4. In a trimming machine, means for guiding a heel a margin of the attached cover of which projects beyond the heel, and cutters arranged for movement in angularly disposed paths intersecting each other between the opposite side faces of the projecting margin of the cover of the heel guided past said cutters to trim said 6 margin to a predetermined width with beveling cuts.

5. In a trimming machine, means for guiding a heel a margin of the attached cover of which projects beyond the heel, cutters arranged for'6 movement in angularly disposedpaths intersecting each other between the opposite side faces of the projecting margin of the cover of the heel guided past said cutters, and mechanism for moving each of the cuttersacross the path 7 of movement of the other alternately to trim said margin to a predetermined width with beveling cuts.

6. In a trimming machine, spaced guide members H constructed and arranged to engage, the-75 opposite sides of a piece of flexible sheet material, and cutters constructed and arranged each to enter one side of the material at spaced points and to progress along fixed paths to the opposite side of the material, said paths being arranged to intersect each other between the sides of the material guided by said members past the cutters thereby to trim a portion of the material with intersecting beveling cuts.

7. A trimming machine having, in combination, a gage for engaging a side of a heel provided with a breast cover a lateral margin of which projects beyond a breast edge of the heel, a gage for engaging the covered breast of the heel, said gages being spaced to form an opening for receiving said projecting margin and constructed and arranged to brace the said margin, and cutters for trimming the projecting margin guided past the cutters and braced by said gages with a pair of intersecting cuts thereby to form a V-shaped margin which extends slightly laterally of the breast edge of the heel.'

8. A trimming machine having, in combination, a gage for engaging a side of a heel provided with a breast cover a lateral margin of which projects beyond a breast edge of the heel, a gage for engaging the covered breast of the heel, said gages being arranged to engage the heel adjacent to said breast edge and spaced to provide an opening for receiving said margin, and cutters mounted for movement in paths which are disposed in angular relation and intersect each other between the opposite side faces of the projecting margin of the breast cover guided by said gages thereby to form a trimmed flap lateral .edges of which are provided with a pair of beveled faces inclined to each other.

9. In a machine for trimming a projecting margin of a cover attached to a heel, a pair of gages provided with convex heel engaging surfaces spaced from each other to provide an opening for receiving the projecting margin, and a pair of knives movable in angularly disposed paths intersecting each other approximately midway between the sides of said projecting margin thereby to bevel said margin with a pair of intersecting cuts.

10. In a trimming machine, a gage provided with a work engaging face, a knife provided with a cutting edge movable in a fixed-path, means for operating the knife to cause the cutting edge to move substantially into engagement with said face, a second gage spaced from the first named gage and provided with a work engaging face, and

a second knife movable in a fixed path whichextends beyond the working face of the second gage and is inclined at a substantial angle to the path of movement of the first-named knife.

11. In a trimming machine, a gage provided with a work engaging face, a knife provided with a cutting edge movable in a fixed path, means for operating the knife to cause said cutting edge to move substantially into engagement with said face, a second gage spaced from the first-named gage and provided with a work engaging face, and a second knife movable in a fixed path which extends beyond the work engaging face of the second gage and is inclined at a substantial angle to and intersects the path of movement of the first-named knife.

12. In a trimming machine, a gage provided with a convex work engaging face, a knife movable in a fixed path and having a cutting edge which is laterally curved in accordance with the curvature of said face, means for operating the knife to cause said cutting edge to move substantially into engagement with said face, a second gage spaced from the first-named gage and provided with a convex work engaging face, a second knife provided with a laterally curved cutting edge and movable in a path which extends beyond the work engaging face of the second gage and is inclined at a substantial angle to and extends beyond the path of movement of the first-named knife, and mechanism for operating the knives.

13. In a trimming machine, a gage provided with a convex work engaging face terminating in a curved edge, a knife movable in a fixed path and having a cutting edge which is laterally curved in accordance with the curvature of said edge of the gage, means for operating the knife to cause its cutting edge to move substantially into engagement with said edge of the gage, a second gage spaced from the first named gage and provided with a convex work engaging face, a second knife provided with a laterally curved cutting edge movable in a path which extends beyond the work engaging face of the second gage and is inclined at a substantial angle toand intersects the path of movement of the first named knife, and mechanism for alternately operating each of the knives across the path of movement of the other knife.

14. A trimming machine comprising a pair of gages constructed and arranged to engage angularly disposed faces of a heel a margin of an attached cover of which projects beyond the heel, said gages being spaced to provide an opening for said projecting margin of the cover, and a pair of cutters movable in paths disposed at substantial angles to each other and constructed and arranged to trim the projecting margins to a predetermined width with a pair of beveling cuts disposed in angular relation to each other.

15. In a trimming machine, a pair of cutters provided with cutting edges portions of which are movable in fixed intersecting paths included in a single plane for trimming the projecting margin of a cover attached to a heel, spaced gages constructed and arranged to engage simultaneously angularly disposed surfaces of the heel for guiding the heel and the projecting margin past the cutters, and mechanism for alternately moving each of the cutters across the path of movement of the other to trim the projecting margin with a pair of beveling cuts.

16. In a trimming machine, means for guiding and bracing a projecting margin of a cover which is attached to a heel, a pair of cutter carriers, a cutter secured to each of the carriers, said cutter carriers being constructed and arranged for movement to cause the cutters to move in paths intersecting each other between opposite faces of the projecting margin of the cover of the heel guided past said cutters, a bell-crank lever, universal connections between opposite arms of the lever and the respective carriers, and mechanism for operating the carriers to cause the cutters to move alternately across the margin supported by said means thereby to trim the projecting margin to a predetermined width with a pair of beveling cuts.

GEORGE HAZELTON. 

